#include <iostream>

using namespace std;



void HelloFunction()
{
	cout << "Hello world"<< endl;
}


void InputNumber(int& num)
{
	cin >> num;	
}


void DisplayNumber( int num )
{
	cout << num;
}

void DisplayText( const char* t)
{
	cout << t;
}

void EndLine( )
{
	cout << endl;
}




int main()
{
	HelloFunction();
	int x;
	InputNumber(x);
	DisplayText( "The number was: ");
	DisplayNumber( x );
	Endline();
}